Refractory-arch construction



A. H. WILLETT.

REFRACTORY ARCH CONSTRUCTION- I APPLICATION FILED APR. 24, l9l9- 1,342,931 Patented June 8, 1920.

2 SHEETS-SHEET l.

IN VENTOR. WITNESSES m W g I I W'ITORNEYB A. H. WILLETT.

REFRACTORY ARCH CONSTRUCTION.

APPLICATION FILED APR. 24. 1919.

Patented June 8, 1920.

2 SHEETS-SHEET 2- INVENTOR. awxm WITNESSES UNITED STATES PATENT OFFICE.

ALFRED H. WILLETT, OF WEST NEW YORK, NEW JERSEY, ASSIGNOR TO AMERICAN ARCH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

REFRACTORY-ARGI-I CONSTRUCTION.

' Application filed April 24,

To all whom it may concern Be it known that I, ALFRED H. IVILLETT, a citizen of the United States, residing at Vest New York, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Refractory-Arch Constructions, of which the following is a specification.

This invention has reference to refractory arches such as are used in fire boxes and particularly in the fire boxes of locomotives and to an improved form of supporting brick of particular service in connection with shallow fire boxes wherein such special brick is utilized at the front of the fire box for providing a convenient means for elevating the first course of the brick to increase the firing clearance between the arch and grate.

The special brick referred to is designed to be applied to the arch tubes and in the preferred form of my invention, I provide such special form of brick with a double end construction which can be used either with arches in which the brick span is from tube to tube or in which two bricks have their outer ends supported upon tubes and are inclined toward each other and interlocked along the plane of contact.

A further object of my present invention is, the provision of a brick of the type specified in which the upper surface of the special brick is made to conform in shape to the arch tube, thereby readily adapting itself to supporting the bricks which are rested upon it.

The above as well as such other objects as may hereinafter appear, I attain by means of a construction which I have illustrated in preferred form in the accompanying drawings, wherein- Figure 1 is a longitudinal sectional View of a fire box showing my improvements applied thereto; Fig. 2 is a perspective view of my improved form of special supporting brick; Fig. 3 is a transverse sectional view through the fire box showing the arch in elevation and Fig. 4 is a horizontal sectional view of a portion of the fire box showing, in plan view, the arch of Fig. 3.

Referring now more particularly to Fig. 1 it will be seen that I have therein shown a fire box having a flue sheet 1, a crown sheet 2, a rear sheet 3 and'the usual door opening 4, all combined with a series of Specification of Letters Patent.

Patented June 8, 1920.

1919. Serial No. 292,378.

arch tubes 5 which lead from the front water space or leg (3 backward to the rear water leg 6 and are curved at the forward end preferably as shown at 7.

Supported upon the tubes 5 is a refractory arch 8 which as shownin Figs. 3 and 4, is composed of a plurality of rows of bricks of a well known type, in which the intermediate rows incline toward each other and are provided with interlocking tongues and grooves as shown.

Beneath the forward row of bricks, as indicated in Fig. 1, I place the special improved form of supporting brick 9 which is made with a curved recess 10 on its under face, arranged so that it will securely rest upon a tube 5 above the curved portion 7. Convexly curved surfaces 11 are provided on the upper face which corresponds substantially to the diameter or radius and curvature of the tubes 5 so as to provide stable supports for those bricks of the refractory arch 8 which rest upon the brick 9.

Upon the upper side of the brick 9, I provide also an upstanding projection 12 which is connected with a forwardly projecting flange 13 and a supporting bracket 14, as clearly shown in Fig. 2.

It will be seen that with the brick 9 mounted in the position shown in the drawings, the forwardly projecting flange 13 will rest against the flue sheet 1 and, with the brick of the arch 8 resting upon its upper face, it will be securely held in po sition upon the curved part 7 of the tubes 5. The projection 12 serves as an abutment to hold the arch 8 from sliding forward.

From the above description it will now be clear that where the fire box is of what is called the shallow type, the raising of the refractory arch 8 at the forward edge by the introduction of such a supporting brick 9, will provide a considerably greater clearance and space for the fire near the front water leg 6 and between the tubes 5. It will also be evident that with the ends of the special brick- 9 formed as shown in Fig. 2 of unequal length, the space between the flue sheet and the forward edge of the arch may be varied by simply reversing the supporting brick, that is turning it end for end.

In the position illustrated, the bracket 14 projects between the bricks of the arch but if used in its reversed relation the flange 13 would so project. In either case this provides an additional means for preventing displacement of the supporting brick besides lending greater rigidity to the arch construction as a Whole and increased strength to the supporting brick itself.

I claim:

1. 'An improved refractory arch construction, comprising in combination brick supporting tubes, a refractory arch carried on said tubes in inclined position, and a supporting brick on each tube which carry upon their upper sides the forward edge of the refractory arch, said supporting bricks having their ends of unequal length beyond the central portion whereby to vary the space forward of the arch by reversal of the position of the supporting bricks.

2. An arch construction for fire boxes comprising in combination, an arch tube, a refractory arch carried thereon, and an arch elevating brick, said brick having a tube engaging surface on one face and an arch supporting surface and an arch abutment on the opposite face.

.3. An arch construction for fire boxes comprising in combination, an arch tube, a refractory arch carried thereon, and an arch supporting brick, said brick having a tube engaging surface on one face and having on the opposite face an arch abutment and a pair of surfaces adapted to support the arch extending toward the ends of the brick one on each side of said abutment.

4:. An arch construction for fire boxes comprising in combination, an arch tube, a refractory arch carried thereon, and an arch supporting brick, said brick having a tube engaging surface on one face and having on the opposite face an arch abutment and a pair of surfaces adapted to support the arch extending toward the ends of the brick one on each side of said abutment, said abutment being located at uneven distances from the ends of the brick.

5. An arch construction for fire boxes comprising in combination, arch times, a plurality of refractory bricks forming an arch carried thereon, and an arch supporting brick for each tube, said'brick having a tube engaging surface on one face and an arch supporting surface and an upstanding flange on the opposite face, said flange adapted to project between bricks of the arch.

In testimony whereof, I signed my name.

ALFRED H. "VILLETT.

have hereunto 

